<template>
  <a-modal
    title="分步对话框"
    :width="640"
    :visible="visible"
    :confirmLoading="confirmLoading"
    @cancel="handleCancel"
  >
    <a-spin :spinning="confirmLoading">
      <a-steps :current="currentStep" :style="{ marginBottom: '28px' }" size="small">
        <a-step title="基本信息" />
        <a-step title="配置规则属性" />
        <a-step title="设定调度周期" />
      </a-steps>
      <a-form :form="form">
        <!-- step1 -->
        <div v-show="currentStep === 0">
          <a-form-item label="规则名称" :labelCol="labelCol" :wrapperCol="wrapperCol">
            <a-input v-decorator="['name', {rules: [{required: true}]}]" />
          </a-form-item>
          <a-form-item label="规则描述" :labelCol="labelCol" :wrapperCol="wrapperCol">
            <a-textarea :rows="4" v-decorator="['desc', {rules: [{required: true}]}]"></a-textarea>
          </a-form-item>
        </div>
        <div v-show="currentStep === 1">
          <a-form-item label="监控对象" :labelCol="labelCol" :wrapperCol="wrapperCol">
            <a-select
              v-decorator="['target', {initialValue: 0, rules: [{required: true}]}]"
              style="width: 100%"
            >
              <a-select-option :value="0">表一</a-select-option>
              <a-select-option :value="1">表二</a-select-option>
            </a-select>
          </a-form-item>

          <a-form-item label="规则模板" :labelCol="labelCol" :wrapperCol="wrapperCol">
            <a-select
              v-decorator="['template', { initialValue: 0, rules: [{required: true}]}]"
              style="width: 100%"
            >
              <a-select-option :value="0">规则模板一</a-select-option>
              <a-select-option :value="1">规则模板二</a-select-option>
            </a-select>
          </a-form-item>

          <a-form-item label="规则类型" :labelCol="labelCol" :wrapperCol="wrapperCol">
            <a-radio-group
              v-decorator="['type', {initialValue: 0, rules: [{required: true}]}]"
              style="width: 100%"
            >
              <a-radio :value="0">强</a-radio>
              <a-radio :value="1">弱</a-radio>
            </a-radio-group>
          </a-form-item>
        </div>

        <div v-show="currentStep === 2">
          <a-form-item label="开始时间" :labelCol="labelCol" :wrapperCol="wrapperCol">
            <a-date-picker
              v-decorator="['time', {rules: [{ type: 'object', required: true, message: 'Please select time!' }]}]"
              style="width: 100%"
            />
          </a-form-item>
          <a-form-item label="调度周期" :labelCol="labelCol" :wrapperCol="wrapperCol">
            <a-select
              v-decorator="['frequency', { initialValue: 'month', rules: [{required: true}]}]"
              style="width: 100%"
            >
              <a-select-option value="month">月</a-select-option>
              <a-select-option value="week">周</a-select-option>
            </a-select>
          </a-form-item>
        </div>
        <!-- step1 end -->
      </a-form>
    </a-spin>
    <template slot="footer">
      <a-button key="back" @click="backward" v-if="currentStep > 0" :style="{ float: 'left' }">上一步</a-button>
      <a-button key="cancel" @click="handleCancel">取消</a-button>
      <a-button
        key="forward"
        :loading="confirmLoading"
        type="primary"
        @click="handleNext(currentStep)"
      >{{ currentStep === 2 && '完成' || '下一步' }}</a-button>
    </template>
  </a-modal>
</template>

<script>
import pick from 'lodash.pick'

const stepForms = [
    ['name', 'desc'],
    ['target', 'template', 'type'],
    ['time', 'frequency']
]

export default {
    name: 'StepByStepModal',
    data() {
        return {
            labelCol: {
                xs: { span: 24 },
                sm: { span: 7 }
            },
            wrapperCol: {
                xs: { span: 24 },
                sm: { span: 13 }
            },
            visible: false,
            confirmLoading: false,
            currentStep: 0,
            mdl: {},

            form: this.$form.createForm(this)
        }
    },
    methods: {
        edit(record) {
            this.visible = true
            const {
                form: { setFieldsValue }
            } = this
            this.$nextTick(() => {
                setFieldsValue(pick(record, []))
            })
        },
        handleNext(step) {
            const {
                form: { validateFields }
            } = this
            const currentStep = step + 1
            if (currentStep <= 2) {
                // stepForms
                validateFields(stepForms[this.currentStep], (errors, values) => {
                    if (!errors) {
                        this.currentStep = currentStep
                    }
                })
                return
            }
            // last step
            this.confirmLoading = true
            validateFields((errors, values) => {
                console.log('errors:', errors, 'val:', values)
                if (!errors) {
                    console.log('values:', values)
                    setTimeout(() => {
                        this.confirmLoading = false
                        this.$emit('ok', values)
                    }, 1500)
                } else {
                    this.confirmLoading = false
                }
            })
        },
        backward() {
            this.currentStep--
        },
        handleCancel() {
            // clear form & currentStep
            this.visible = false
            this.currentStep = 0
        }
    }
}
</script>
